Printing mask



Jan. 16,1923. 1,442,723

C. E. HAND. PR NT x NG MASK, FILED Nov. 7, 192] 2 SHEETS-SHEET Z INVENToR.

ATTORNEYS.

' f y W/z'ff ji BY Patented dan. 16, 1923 t il narrar PRINTING MASK.

`vApplication. filed November '7, 1921. Serial No. 513,273.

To all whom t may concern Be it known that l, CLAUDE E. HAND, a citizen of the United States, residing at Walla lilalla, in the county of `Walla Nella and State of VVashingto-n, have invented certain new and useful improvements in Printing Masks, of which the following is a specification.

This invention relates to printing masks as applied to lprinting presses where two or three `colored printing is desired. One 0bject of the invention is to provide a means of the class mentioned that is cheap to manufacture, that is quickly attachable or de tachable without alter-ation` of the press. A further object yof the invention is to provide a means whereby the several ink`jcolors used with the device cannot run together.

With these and other objects in view reference is now had 'to the accompanying drawings in which Fig. l is -a plan view of the mask with auxiliary mask in place.

Fig. 2 is a half plan view ofthe mask with auxiliary mask removed.

Fig. 3 is a sectional view on the line 3-3 of Fig. 2.

Fig. 4 is a side elevation of auxiliary mask hinge in the closedposition.

Fig. 5 is a side elevation of auxiliary mask hinge in position forvremoval of auxiliary mask.

Fig. 6 is a side elevation of auxiliary mask latch in closed position.

' Fig. 7 is a side elevation of 4an inking roll as used on the mask with auxiliary-mask removed.

FigQS is a side elevation of an inking roll as used on the `mask with auxiliary mask in place.

Fig. 9 is an inking diagram.

Fig. l0 is an inking diagram.

Fig. 1l is a side elevation of brace.

Fig. l2 is a rear elevation of brace.

Fig. 13 is a side elevation of printing press with device applied; and

Fig'. la is a side elevation of inking roll with vibratory roll in position thereon.

Having reference to the drawings, like numerals refer to like parts throughout the several views. `and the numeral 1 refers to a mask provided with a relatively large and eccentrically positioned oriiice 2 and a mutilated perimeter or outer edge 3. Corrugations a are provided in the mask to maintain it slightly above the disc of the printing press 6 and may be curved concentric to the perimeteil of the mask, however i obvious that other forms ot depressions will answer the same purpose. The mask is tapered in cross section toa knife edge (sec Fig. 3) at its inner perimeter thus to pern'iit the printing rollers 8 and 9 respectively to come in contact with the ink on the disc.

About the perimeter of the mask are dif'- posed clips l() andli respectively wherewith to receive and maintain against lateral motion an auxiliary mask l2 provided with a tongue hinge 13 and a latch lll which will be engaged by said clips.

The mask is rigidly attached to the bed l5 of the press by the bolt it; and uprights 17. The above mentioned auxiliary mask may be of similar knife blade section to that of the mask and is provided with corrugations 18 j iositioned preferably to engage the corrugations of the mask when the auxiliary mask is attached to the ma. is shown in Fig. l. rlhe auxiliary mask is provided with a relatively small orilice i9 centrally disposed therein7 and the two diametrally opposite sides 2() and 2l respect/ivob7 are cut in a straight line in a manner that the side 2l will uncover a part el the relatively largo oriiice 2; in other words the auxiliary mask is positioned on the mask to partly cover the large orice; by this means a blank space 22 is left between this exposed portion of the large orifice and the small orifice in the auxiliary mask and will be presently explained, as will a similar blank space which is also 'provided between the small orifice and the edge 24 of the mutilated perimeter 3.

The fountain 25 is not disturbed by the addition of the mask or the auxiliary mask. but ink is preferably applied to the discl 5 through the orifices by means of a hand roller, and therefore, as proper ink distribution is essential to good printing. and. as a hand roller does not give proper distribution, it is necessary to properly spread the ink on the ink rollers which is accomplished i by means of a vibratory roller 26 which rolls in cont-act with the ink rollers and which is designed to move reciprocatingljv over the ink rollers to give greater distri bution of the ink on these rollers.

It is now obviousthat where two or more colors of ink are used the action of the vibratory roller would soon mix the colors with the other color.

on the ink rollers, resulting in anything but an artistic product. Hence to avoid the mixing of the colors the ink rollers are provided with grooves 27, 28, 29, 30 and 3l. Presuming now that the auxiliary mask is removed we have the relatively large orifice 2 exposed Vthrough which ink would be received by the ink roller 9 to be distributed as shown in the inking diagram, Fig. l0, where the shaded portion 32 represents the width' ol" type which be covered by ink irom the large orifice, the shaded portion 35 the width of type which may be covered by ink from the mutilated portion 23, and the space 3a that letlt by the groove 27 in the roller 9. lfn this case the blank space 23 is reduced to the size of the space 35 so that with the groove 27 positioned to register in line with a line between the orice and the blank space the ink distribution can only obtain to the g'roo-ve. and one color cannot pass the groove to mix This also applies where the auxiliary mask is used, in which case, however, other grooves must be cut in the roller S to prevent the spreading` of ink over the spaces 22 and 23 and' to confine it to the covering surface as shown in the inking diagram, F ig. 9.

ln use the device is applied to the press, the form set, the necessary colors placed on the disc, the press set in motion, when a product will be obtained having vari color work which will be as artistic as when run through a press for each color.

Having thus described my invention, l claim:

1. in a printing mask, the combination oi: a mask provided with a relatively large eccentrically positioned orifice and a mutilated periphery, means attached to said mask to receive and maintain against lateral and longitudinal motion an auxiliary mask, means for rigidly attaching said mask to a printing press, said auxiliary -mask attachable to said mask and provided with a centrally disposed orice, said auxiliary mask positioned to partly cover said relatively large oriiice and provide blank spaces between said orifice andthe orifice in the auxiliary mask, and inking rollers provided with grooves positioned to register in line with the line between said orifices and said blank spaces.

2. In a printing mask, the combination of a mask provided with a relatively large and eccentrically positioned orifice and a mutilated periphery, said mask provided with corrugations, means to rigidly lattach said mask to a printing press, an auxiliary mask detachably mounted on said mask and provided with a `relatively small and centrally disposed orifice, said auxiliary masx positioned to partly cover said relatively large orifice and provide blank spaces between said orifice and the relativelysmall orifice, and inking rollers providedv with grooves positioned to register in line with a line between said orifices and said blank spaces. l

3. ln a printing mask, the combination oi an annular mask', having a portion of its periphery .multilatech with a' relatively large orifice in said mask, and tapered'in cross section to a knifeedge at the inner periphery of' saidv mask, co-rrugations in said mask, means for rigidly attaching said mask to a printing press, an auxiliary mask de- `achably mounted on said mask and provided with a relatively small and centrally disposed orifice, and rfurther provided with corrugations, said corrugations `positioned to register with the corrugationsl in'said mask, said auxiliary mask positioned to partly cover thelarge orifice in said mask and provide blank spaces between said orifice and the small orifice in said auxiliary mask, and inking rollers provided with grooves positioned to register in linev with a line between said orifices andV said blank spaces.

l n testimony whereof I aliix my signature.

CLAUDE n. HAND.

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